gdb/testsuite/gdb.btrace/tailcall.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2013-2020 Free Software Foundation, Inc.
   4
   5    Contributed by Intel Corp. <markus.t.metzger@intel.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 static __attribute__ ((noinline)) int
  21 bar (void)
  22 {
  23   return 42;
  24 }
  25
  26 static __attribute__ ((noinline)) int
  27 foo (void)
  28 {
  29   return bar ();
  30 }
  31
  32 int
  33 main (void)
  34 {
  35   int answer;
  36
  37   answer = foo ();
  38   answer += 1;
  39
  40   return answer;
  41 }